- At least 1 measurable or evaluable mass at least 1.1 cm (except for patients with stage I disease where the entire mass was removed for diagnostic purposes) NOTE: A new classification scheme for adult non-Hodgkin's lymphoma has been adopted by PDQ. The terminology of "indolent" or "aggressive" lymphoma will replace the former terminology of "low", "intermediate", or "high" grade lymphoma. However, this protocol uses the former terminology.